Good morning. It's been 5 months since the 2nd (left) knee was replaced and 8 months since the right was replaced. I have some days where I have some weird pain (s) but generally speaking all is well. I rode my motorcycle a few times this month, first time in almost a year. I find that my leg placement when sleeping contributes to my weird pains. When standing up from a sitting position, both my knees "crunch" for lack of a better word, but no pain. I can't imagine running yet, not that I ever did, but bicycling, kayaking and walking is on the table. Working toward squats but the crunch is annoying. At the end of the day stiffness sets in and both my knees ache a bit. Nothing I didn't expect.
Good Luck to all
Jim